Question
Can a hot-wire ammeter be used to measure a direct current having a constant value? Do we have to change the graduations?

Answer

Yes, in this case $I_{\text {rms }}$ value will be same as the DC current.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

What is the principle of calorimetry?
What is the specific enthalpy of a gas during the adiabatic process?
A batsman hits back a ball straight in the direction of the bowler without changing its initial speed of $12 m s ^{-1}$. If the mass of the ball is $0.15 kg$, determine the impulse imparted to the ball. (Assume linear motion of the ball)
A body is moving in a circular path such that its speed always remains constant. Should there be a force acting on the body?
Textbooks on science may give you a wrong impression that studying science is dry and all too serious and that scientists are absent-minded introverts who never laugh or grin. This image of science and scientists is patently false. Scientists, like any other group of humans, have their share of humorists, and many have led their lives with a great sense of fun and adventure, even as they seriously pursued their scientific work. Two great physicists of this genre are Gamow and Feynman. You will enjoy reading their books listed in the Bibliography.
During blood transfusion the needle is inserted in a vein where the gauge pressure is 2000Pa. At what height must the blood container be placed so that blood may just enter the vein? [Use the density of whole blood from Table 10.1].
What is the work done by earth's gravitational force in keeping the moon in its orbit?
The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative: Work done by an applied force on a body moving on a rough horizontal plane with uniform velocity.
Why is sound heard in water more intense in comparison to sound heard in air?
At what angle should a ball be thrown so that its horizontal range is maximum?